AmpPRO simplifies the installation of upgraded amplifiers in data-bus controlled amplified sound systems. With AmpPRO, you can improve audio performance while keeping an original radio’s fit, finish and features. Compatibility Note: This product is compatible with data-bus controlled amplified systems only. To identify these systems, look for logos on door speakers, tweeters, dash speakers or the subwoofer to confirm if the vehicle has a compatible amplified system: Alpine, Beats or Harman Kardon. Vehicle manufacturers do not always brand compatible systems. Unbranded amplified systems are generally identified by locating a center channel speaker or subwoofer. Benefits Simplifies amplifier installation Prevents need for summing and DSP devices Provides factory sound system upgrade solution Features Can be used to upgrade the entire sound system or just part of it thanks to retention of the original amplifier Enables the addition of a subwoofer system to the original sound system Variable volume, fade, balance, bass, mid and treble audio settings Front, rear, sub preamp outputs (5 volt RMS) Provides flat audio output for a solid audio foundation Customized OE bass, mid and treble center frequency selection Retains uConnect, Bluetooth audio and all warning chimes Plug & play installation Sub level controller Optional TOSLINK optical output (APA-TOS1 sold separately) Includes: AmpPRO module 22-pin harness (Dual MS CAN) Bass knob Knob harness Manual   PLEASE CHECK COMPATIBILITY OF YOUR VEHICLE ON www.pac-audio.com BEFORE ORDERING. WE CANNOT ACCEPT RETURNS ON THIS ITEM.